Adjustable seat-rail attachment.



G. R. ALLEN. ADJUSTABLE sum RAIL ATTACHMENT.

APPLICATION FILED JULY 2, 190a.

Patent-ed Apr. 13, 1909.

Jay. 5.

CHARLES R. ALLEN, OF CORTLAND, NEW YORK.

ADJUSTABLE SEAT-RAIL ATTACHMENT.

Specification of Letters Patent.

Patented April 13, 1909 Application filed July 2, 1908. Serial No. 441,667.

To all whom it may concern:

Be it known that 1, CHARLES R. ALLEN, a citizen of the United States, and resident of Cortland, in the county ot Cortland, in the State of New York, have invented new and useful Improvements in Adjustable Seattail- Attachments, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

The object of this inve tion is to provide a seat-rail attachment composed of a minimum number of parts adapted to be applied to a plain rail of the usual oval or similar shape in cross-section throughout the length thereof, and shall have the rail-gripping eye adjustable in diameter to conform to the rail which it is to firmly embrace. And to that end the invention consists in the improved construction of the rail-gripping member of the seat-rail attachment as hereinafter more fully described and claimed.

In the accompanying drawings Figure 1 is a. fragmentary transverse section of a carriage-seat equipped with a rail fastening device embodying my invention; Fig. 2 is a plan view of the same; Figs. 3 and t illustrate the manner of applying the attachment to the seat-rail; and, Figs. 5 and G are plan and edge views respectively of the blank from which the rail attaching yoke is formed.

Similar characters of reference indicate corresponding parts.

A- represents the carriage-seat, and B the rail which surrounds the back and sides of the seat and is fastened to the outwardly extending arms -C of the usual brackets -C which are rigidly attached to the walls of the seat. The outer end of the arm C is perforated for the reception of the attaching shank a of the railfastener.

My improved seat-rail attachment consists of the hook-shaped yoke Z formed on the end of the shank -a and composed of suitable metal which allows the yoke to be compressed circumferentially for the purpose hereinafter explained. This yoke is formed with a lateral opening c between its ends for receiving the seat-rail B-. transversely through it and allow the yoke to be turned in the direction indicated by the arrow d in Fig. 3 and to the position shown in F ig. a and thus straddle the rail B-. The free end of the yoke is formed with tongues or spaced extensions -ccand preferably with upwardly prosions. The yoke is applied to the seat-rail -B in the manner hereinbefore described before the attaching shank ais inserted in the arm After the attaching shank is applied to the arm G and the nut -n. applied to the protruding lower end of the shank, the yoke is compressed circumferentially to cause the extensions c c to lap onto the base or bottom portion of the yoke and form the rail-gripping eye which completely and tightly emb'aces the rail as shown in Fig. 4. Said compression of the yoke may be effected by means of a suitable tool. in compressing the yoke as aforesaid, the extensions 6 eare inserted between the bottom of the rail and top of the arm C and then, by tightening the nut -n so as to firmly press on the underside of said arm, the yoke 7) is drawn down onto the arm C so as to retain the yoke in its embracing position and lock the yoke-extensions on the rail as clearly shown in Fig. at of the drawings.

The described attachment is readily adjusted longitudinally on the rail -B to grip the rail at different points in the length thereof, said adjustment being effected by loosening the nut so as to release the yoke from compression and allow said yoke to be shifted longitudinally on the rail according to the position of the bracket C.

The yoke and its attaching shank is preferably formed from a blank shown in Figs. and 6 of the drawings and consisting of the elongated flat main portion 1-, the cylindrical portion 2 on one end of said main portion, and the spaced extensions con the opposite end of said portions. In forming the yoke the cylindrical portion -2- is screw-threaded to form the attaching shank -a. The main portion -1 is bent in the form of the yoke b, and the extensions ceare bent to lie across the bottom of the rail -B- and rest directly on the top of the arm C Having described my invention, what I claim is 1. An adjustable seat-rail attachment having its rail-gripping member consisting of a circumferentially compressible hook formed with an opening between its ends for receiving the seat-rail transversely through said opening. the attaching shank extending from one end of said hook, the opposite end of the hook being inserted between the seatrail and its supporting arm and locked thereby on the seat-rail.

An adjustable seat rail attachment comprising a circuinferentially compressible hook straddling said seat-rail and formed at one end with the attaching shank passing through the supporting bracket ofthe rail, the opposite end of said hook being formed with extensions inserted between the bottom of-the rail and underlying arm of the supporting bracket and lapped onto the attached end of the hook, said extensions being forced into said lapping position by the tightening of the nut of the attaching shank.

3. An adjustable seat-rail attachment consisting of a circumterentially compressible yoke straddling said rail and formed on one end with the attaching shank passing through the supporting bracket of the rail, 20

the opposite end of said yoke being formed with extensions disposed to receive between them the portion of the yoke adjacent to the attaching shank and formed at their ends with grippers engaging the rail, said extensions being inserted between the bottom of the rail and underlying arm of the supporting bracket and clamped in said position by the tightening of the nut 0n the attaching shank.

CHARLES R. ALLEY. Witnesses:

H. J. HARRINGTON, HELEN MILLER. 

